Baker&#39;s oven.



W. L. BATES- BAIIERS OVENL APPLICATION FILED DEC. 1917.

Immwu. meme@ Apr. 23, 191s;

@Hon/w1) citizen` of the United Statesa residing IGAKEMS SVEN,

neea'aea.

Speeioation oi' ltettera Patent. y

To all wwm `it may concern:

Be it known that l, W'Anoo L. Barns, a at tate oston, inthe county of Sulolk and b of Massachusetts have invented certain new and useful Improvements in Bakers Ovens, of wluiclnv the following is a specification, referencebe'ing had to the accompanying drawings. Y

This invention relates to bakers ovens and hasor a primary ob'ect to provide simple and edectivemeans or 'quicklyr heating the interior of the oven to a maximum degrec, in the baking of bread, and for rapidly Y cooling thebvn for pastry baking.

llt is another and more particular object of the invention to provide a bakers oven ttil ell

having .a continuous Hue extending under the bottom of the oven, around. the rear end thereof and longitudinall over the top ot the oven to an outlet at t e forward end, a

vdani er plate for admitting the heat and,

ro ucts of combustion from the lire box ireotly into the flue beneath tbe oven, and e. cold air inlet damper operable to admit atmospheric air into said flue beneath the oven when the rst named damper is closed.

lltis a further general object of my invenc tion to imirove the construction of bakers ovens in t @particulars above stated, witbout greatly increasing the cost oiE installation or erection of the oven. e

With the above and other objects in view the invention consists in the improved oonstruction',y combination and arrangement of Y tbe several parts to be hereinafter more lully described, subsequently claimed and illustrated in the accompanying drawings in which similar reference characters designate corresponding parte throughout the several views, `and wherein@4 Figure 1 is a longitudinal section through a bakersj oven v illustrating one embodiment oil my invention; y

Fig. 2 `is a. fragmentary vertical section el the forward end of the oven showing; a

slightly -modied form of the het air damper.

Referring in detail to the drawing li and 6 designate respectively tbe upper and lower double walls oi' the oven which are support ed and spaced apart by means of a plurality of metal bridge members or girders These spaced walls are preferably formed of tiling as is usual in the construction oi? suoli ovens and provide upper and lower continu@ ous longitudinally extending .tlues and il respectively. To the 'rear ends ci? these flues, a communicating; due et sheet metal designated at l0 is suitably connected. ll rom the lowermost wall 6' of tbe oven proper at its rear end, a sheet metal wall ll extends downwardly to the :door and conu stitutes the rear end wall of a beat chamber l2 'This wall ll its upper end provided with an opening` in which a leg or en tension 13 from the tine connection it@ is suitably connected.

llldesignates the bony wliicla4 is meant ed and arranged beneath the oven at the lon ward end thereof. An outer metal shell casing l5 incluses the oven and the lire and is provided at its forward end with suit-- able doors adording access to the doors on; the forward end of the loon when is necessary to feed fuel into the latten 16 designates the swinging; or pivetall'uv -:mounted oven door the :tree lower end which is adapted im: engagement in 'tbe closed position et tbe door with lioriaonm tally disposed plate l? entendi between the forward end of the upper wa front wall olf the @asili-:1W 'liliis .fen door may be mounted and errang, d in v nary or approved manner and is *hereje*- olv provided with the usual eounter'bal weight whereby the door returned to arm 22 to which the rearend of a rod 23 is pivotally connected. This rod extends forwardly through an opening 2t in the iront wall of the casing and is provided with 5 a suitable hand hold whereby the rod may be conveniently actuated. In the position of this rod as seen in Fig. 1 of the drawings, the damper plate is disposed in a vertical position and closes communication beio tween the space 18 above the lire box and the forward end of the longitudinal flue 9.-

The front wall of the casing 15 is further provided above the rod 23 with a cold air inlet opening 25 which is normally closed 15 by means of the pivoted damper plate 26. In the operation of the device as shown in Fig. 1,r ywhen it is desirable to obtain a f relatively high bottom or Hoor heat in the oven, as infthe baking ci bread, the rod 23 29 'is pulledout'wardly thereby swinging the damperplate 20 downwardly upon the horizontal plate 19. A portion of hot'air and products of combustion will nowpass forwardly over the top of the lire box 14 and 2 upwardly into the forward end 0.1": the ue 9,

thence rearwardly beneath the oven to the vertical flue 10 and into the rear end of the upper fine 8. Finally, the products of? combustion pass forwardly through this upper t0 iue and are liberated to the atmosphere through the outlet flue 'of stack 27 connected to the forward end of the iue 8, the stack 27 is of course equipped with a suitable damper so that the draft through the stack $5 may be regulated as desired. By thus causing the hot air to contact directly with the upper one'of the lower walls 6,th1s wall will be very quickly and highly heated and the temperature of the oven increased t0 the e0 maximum degree.

. tries, it is of course desirable that the oven ln the baking of passhould be relatively cool and in such case the rod 23 1s forced inwardly to ralse the 'damper 20 to its closed position over the et forward end o the space 18 above the tire box, thereby 'cutting 0E communication between the space'and the iue 9. The damper plate 2G is then moved to its open position .so that atmospheric air will be drawn nl through the opening 25 and the iiues 9, l0

Thus the oven and 8 around the urnace. 'walls will he quickly cooled and the temperature of the baking chamber reduced to the desired degree. The products of combustion and hot air from the re box will now pass into the extension i3 of the iiue l() and be drawn directly into the rear end of the ue 8 and thence into the outlet stack 27.

ln Fig. 2 oi the drawing I'have shown a' ou slightly modied form of the hot air slotted valve plate 30, is slidable upon the plate 29 and is provided with a central upstanding stud 31 to which the inner end of a lever 32 is loosely connected, said lever being pivotally mounted on the plate 29 as at 33 and having an arm 34 extending outwardly through an' opening in the front wall of the casing 15. It; will be` readily understood that by moving the arm 34 laterally in one direction, the plate will be moved to register the slots or openings therein with the slots in the plate 29 so that the hot air may pass from the fire box into the forward end of the fiue 9. The cold air damper plate is of course also provided as in the previously-described form of the dev1ce. l

From-the foreging description taken in connectionv with the accompanying `drawings, the construction,- manner of operation.

and several advantages of my invention will be clearly and fully understood. Itl will be noted that the device consists of' but few parte, and will not materially add to the cost of installation of the oven. The device provides means for easily and quickly regulating the temperature of the oven without necessitating an additional consumption-,of fuel. The operating cost is. therefore reduced to a minimum.. I have above described two forms of the hot air damper, which I have found very satisfactory in practical use. 1t will bee-understood owever that this damper may beotherwise constructed and arran edand the various other structural parts o my invention may also be somewhat modifiedin yform and pro Vortion. Accordingly, Il reserve the privl ege of resorting to all such. legitimate changes as maybe fairly embodiedwithin thesplrit and scope of 'the inventionas claimed.

Having thus fully described my invention, whatl' desire to claim and secure-by Letters Patent is: l

1. 1n a bakers oven spaced lupper and lower walls providing lon 'tudinally extending lues above and be ow the oven chamber, the space ,below the oven at'the rear end thereof constituting aheatchain.- ber, a re box arranged belowthe oven at its ,Forward end and .communicating with said neat chamber, a flue connecting the rear ends of the longitudinal flues 'and havin@r an extension communicating with Said heat chamber, and a damperto open and close communication between the heat chamber and the forward end of the lower longitudinal uc. v

2. In a bakers ovenspaced upper and lower walls providing longitudinally extending fiues above and `below the oven chamber, the space belowv'the oven at` the rear end thereof constituting` aheat chamber, a lire box arranged below the ovenat fmfwa'r @n ani arymmmncating; wh said haai; chamber, a. iue connecting the rear and@ of h@ lsngtudiml ues and having amfmsn cummuncating with said mai; @hmmag :md ab dampe' to open andi dos@ @@mmumication between the hem; shamber .d 15h@ 'fm-@Ward and of the lower longitudi- 

